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Add setUnlimitedProxyAllowanceAsync and setUnlimitedAllowanceAsync

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Leonid Logvinov
2017-08-24 14:50:27 +02:00
parent 9e76b2dd98
commit 9b66b168ed
1 changed files with 25 additions and 0 deletions
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25
src/contract_wrappers/token_wrapper.ts
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@@ -29,6 +29,7 @@ const ALLOWANCE_TO_ZERO_GAS_AMOUNT = 45730;
* to the 0x Proxy smart contract.
*/
export class TokenWrapper extends ContractWrapper {
public UNLIMITED_ALLOWANCE_IN_BASE_UNITS = new BigNumber(2).pow(256).minus(1);
private _tokenContractsByAddress: {[address: string]: TokenContract};
private _tokenLogEventEmitters: ContractEventEmitter[];
constructor(web3Wrapper: Web3Wrapper) {
@@ -79,6 +80,20 @@ export class TokenWrapper extends ContractWrapper {
gas,
});
}
/**
* Sets the spender's allowance to an unlimited number of baseUnits on behalf of the owner address.
* Equivalent to the ERC20 spec method `approve`.
* @param tokenAddress The hex encoded contract Ethereum address where the ERC20 token is deployed.
* @param ownerAddress The hex encoded user Ethereum address who would like to set an allowance
* for spenderAddress.
* @param spenderAddress The hex encoded user Ethereum address who will be able to spend the set allowance.
*/
public async setUnlimitedAllowanceAsync(tokenAddress: string, ownerAddress: string,
spenderAddress: string): Promise<void> {
await this.setAllowanceAsync(
tokenAddress, ownerAddress, spenderAddress, this.UNLIMITED_ALLOWANCE_IN_BASE_UNITS,
);
}
/**
* Retrieves the owners allowance in baseUnits set to the spender's address.
* @param tokenAddress The hex encoded contract Ethereum address where the ERC20 token is deployed.
@@ -126,6 +141,16 @@ export class TokenWrapper extends ContractWrapper {
const proxyAddress = await this._getProxyAddressAsync();
await this.setAllowanceAsync(tokenAddress, ownerAddress, proxyAddress, amountInBaseUnits);
}
/**
* Sets the 0x proxy contract's allowance to a unlimited number of a tokens' baseUnits on behalf
* of an owner address.
* @param tokenAddress The hex encoded contract Ethereum address where the ERC20 token is deployed.
* @param ownerAddress The hex encoded user Ethereum address who is setting an allowance
* for the Proxy contract.
*/
public async setUnlimitedProxyAllowanceAsync(tokenAddress: string, ownerAddress: string): Promise<void> {
await this.setProxyAllowanceAsync(tokenAddress, ownerAddress, this.UNLIMITED_ALLOWANCE_IN_BASE_UNITS);
}
/**
* Transfers `amountInBaseUnits` ERC20 tokens from `fromAddress` to `toAddress`.
* @param tokenAddress The hex encoded contract Ethereum address where the ERC20 token is deployed.